///////////////////////////////////////////////////////////////////////////////
//
// lighthouse3D - 3D Software Library
//
// File: CFogSynthesis.h
//
///////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2003-2013 Marcus Reinhardt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
///////////////////////////////////////////////////////////////////////////////
//
// You can find a copy of the GNU General Public License (gpl.txt) in the
// directory of the library.
//
///////////////////////////////////////////////////////////////////////////////

#ifndef _CFogSynthesis_H_
#define _CFogSynthesis_H_

#include "math.h"
#include "CBasicClasses.h"

///////////////////////////////////////////////////////////////////////////////
// class CFogSynthesis : Functions for distance fog synthesis
///////////////////////////////////////////////////////////////////////////////

//! Functions for distance fog synthesis

class CFogSynthesis
{

public:

    CFogSynthesis();
    ~CFogSynthesis();
    
    void setFogParameters(float nearDist, float farDist, float fogDens, unsigned int colorFogR, unsigned int colorFogG, unsigned int colorFogB);
    void linearFogSynthesis(float viewerDist, unsigned int &intRed, unsigned int &intGreen, unsigned int &intBlue);
    void exponentialFogSynthesis(float viewerDist, unsigned int &intRed, unsigned int &intGreen, unsigned int &intBlue);
    
private:

	float nearDistance, farDistance, fogDensity, fogParam, distanceMul;
	float oldviewerDist;

    unsigned int colorFogRed, colorFogGreen, colorFogBlue; 

};

#endif
